Updated setup-gazebo usage instructions

Signed-off-by: Saurabh Kamat <[email protected]>

Author: sauk2

index.yaml

@@ -32,19 +32,6 @@ pages:
     title: Continuous Integration For Gazebo Packages
     file: setup_gazebo_in_ci.md
     description: Instruction on using setup-gazebo
-    children:
-      - name: setup_gazebo_in_ci_ubuntu
-        title: Ubuntu Runners
-        file: setup_gazebo_in_ci_ubuntu.md
-        description: Instruction on using setup-gazebo with Ubuntu
-      - name: setup_gazebo_in_ci_macos
-        title: macOS Runners
-        file: setup_gazebo_in_ci_macos.md
-        description: Instruction on using setup-gazebo with mscOS
-      - name: setup_gazebo_in_ci_windows
-        title: Windows Runners
-        file: setup_gazebo_in_ci_windows.md
-        description: Instruction on using setup-gazebo with Windows
   - name: gazebo_classic_migration
     title: Gazebo Classic Migration
     file: gazebo_classic_migration.md

setup_gazebo_in_ci.md

@@ -20,8 +20,8 @@ The action currently supports all the non-EOL Gazebo releases. See [releases](ht
 
 ## Supported Platforms
 
-The `setup-gazebo` GitHub Action works on three platforms,
+The `setup-gazebo` GitHub Action works on three platforms (Ubuntu, macOS and Windows) with the usage instructions for each described below,
 
-* [Ubuntu](setup_gazebo_in_ci_ubuntu)
-* [macOS](setup_gazebo_in_ci_macos)
-* [Windows](setup_gazebo_in_ci_windows)
+* [Ubuntu](https://github.com/marketplace/actions/setup-gazebo-environment#ubuntu)
+* [macOS](https://github.com/marketplace/actions/setup-gazebo-environment#macos)
+* [Windows](https://github.com/marketplace/actions/setup-gazebo-environment#windows)